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Authorities say a man suspected of abducting two girls near an Iowa bus stop had committed suicide.

Dozens of federal, state and local law enforcement are searching by air, land and water for 15-year-old Kathlynn Shepard.

She and a 12-year-old girl were taken near a bus stop in Dayton, about 60 miles north of Des Moines, on Monday afternoon after after being lured into a truck.

"The girls were taken to a rural agricultural facility southeast of Dayton at approximately 4:30 p.m. yesterday," said Charis Paulson, Iowa Department of Criminal Investigations director.

The younger girl was able to escape to a nearby farm.

Authorities say they are broadening their search for the 15-year-old and will put up billboards around the state.

The suspected kidnapper, 42-year-old Michael Klunder, was found dead Monday night at a rural property northeast of Dayton.

In 1991, Klunder pled guilty to the kidnappings of two toddlers near Charles City, Iowa. The 3-year-old girls were found in a trash can, alive, 50 miles away. Klunder was convicted in 1992 and sentenced to 11 years in prison for the kidnapping of a 21-year-old woman near Mason City, Iowa. He was released from prison in February of 2011.

The Iowa Division of Criminal Investigation did not release more details Tuesday about Klunder's death.

Nebraska and Iowa officials said there is no connection between this incident and ones in Washington and Monona counties.

A deputy with the Blackhawk County Sheriff's Department said his department is working with investigators to see if there's a connection with the Evansdale case, but it is too early to tell.